Depression in Teens: Symptoms, Screening, and Treatment
Author: Angela Bogdanova · Published: October 8, 2026 · Editorial Policy
Research cluster: Depression & Depressive Disorders · Written by Artificial Sapiens
Depression in teenagers can alter mood, energy, concentration, appetite, sleep, relationships, motivation, and the ability to participate in school and family life. Some teenagers feel persistently sad or empty; others become unusually irritable, withdrawn, exhausted, or indifferent toward activities they previously enjoyed. The clinically meaningful question is how these changes relate to the young person's usual functioning, how long they persist, and whether there are safety concerns. National Institute of Mental Health.
Parents, teenagers, pediatricians, educators, and mental health professionals need a reliable route from recognizing symptoms to assessment and treatment. Screening can identify a person who needs further evaluation, while diagnosis requires a clinical interview, consideration of alternative explanations, and direct attention to safety. Care can include structured psychological treatment, family and school support, antidepressants in selected situations, and ongoing follow-up. American Academy of Pediatrics, GLAD-PC Part I and Part II.
I. What Is Depression in Teens?
Teen depression refers to depressive symptoms and depressive disorders experienced during adolescence. Depressed mood is one symptom; a major depressive episode is a sustained clinical syndrome with defined criteria; major depressive disorder is diagnosed when that syndrome and the person's history meet diagnostic requirements. Persistent depressive disorder describes a more chronic depressive condition. Clinicians distinguish these levels because course, severity, differential diagnosis, and care may differ. AACAP's 2023 guideline for major and persistent depressive disorders.
A typical major depressive episode involves at least two weeks of qualifying symptoms, with depressed or irritable mood or markedly diminished interest or pleasure among its central features. The associated symptoms, clinically significant impairment, possible medical or substance-related causes, and past manic or hypomanic episodes all matter. A teenager feeling sad after a disappointment may need compassionate support; that alone does not establish major depressive disorder. NIMH depression overview.
The popular phrases “smiling depression” and “high-functioning depression” describe impressions about how suffering appears to others. They are not independent DSM or ICD disorders. A teenager can maintain good grades while feeling intensely distressed; another can perform poorly for reasons other than depression. A clinical assessment attends to personal experience and patterns of change rather than social stereotypes about how depression should look.
II. How Common Is Teen Depression?
The U.S. 2025 National Survey on Drug Use and Health estimated that 15.1% of adolescents aged 12 to 17 had experienced a major depressive episode in the preceding year; 11.0% had an episode associated with severe impairment. These are survey estimates within that program's definitions, not the proportion of teenagers with a confirmed medical diagnosis in any particular community. The report estimated approximately 3.7 million adolescents with a past-year episode. SAMHSA 2025 NSDUH results.
Depression occurs across family backgrounds and identities. Factors associated with increased risk in population research may also affect access to care, willingness to disclose symptoms, and stress exposure. Risk factors guide conversations and public health planning but cannot determine what condition any individual teenager has. USPSTF screening recommendation.
III. Symptoms of Depression in Adolescents
1. Sadness, irritability, and emotional changes
Persistent sadness, feelings of emptiness, hopelessness, shame, worthlessness, or unusual guilt can be symptoms of depression. Teenagers may instead describe constant frustration or anger. An irritability pattern becomes clinically relevant when it represents a sustained change and occurs with other depressive features, rather than being an isolated argument at home. NIMH teen depression.
2. Loss of interest and motivation
A teenager might stop attending practice, abandon a hobby, avoid invitations, or experience little pleasure in gaming, reading, music, or friendships. Reduced ability to experience enjoyment is often called anhedonia. Motivation may feel absent even for previously important goals. These experiences must still be interpreted in context: anxiety, exhaustion, physical illness, conflict, and other difficulties can overlap. NIMH depression.
3. Sleep, appetite, fatigue, and physical complaints
Some young people sleep much longer; others struggle to fall asleep, awaken early, or wake repeatedly. Appetite and weight can increase or decrease. Fatigue, headaches, stomach discomfort, restlessness, slowed movement, and low perceived energy may contribute to the presentation. Sleep schedules, health conditions, substances, medicines, and nutritional difficulties can also produce these symptoms. NIMH teen depression.
4. Concentration and performance
Difficulty paying attention, remembering material, making decisions, and starting tasks can undermine school participation. Declining grades, missed assignments, unexplained absences, and reduced social engagement may be noticeable before the teen describes emotional symptoms. High performance, however, does not rule out depression if maintaining it requires extraordinary effort or distress. Assessment focuses on change from baseline. AAP GLAD-PC Part I.
5. Withdrawal and behavioral changes
Loss of contact with friends, avoidance of family meals, reduced self-care, increased substance use, or sudden abandonment of responsibilities can signal that something important has changed. Such behavior also occurs in other circumstances. Asking what the teenager is experiencing is more useful than assuming an explanation. Repeated changes across several areas of life strengthen the reason to seek evaluation. AACAP guideline.
6. Thoughts of death or self-harm
A teenager may say that life has no purpose, others would be better off without them, or they wish to disappear. Self-harm, suicidal thoughts, behavior suggesting preparation for suicide, or an immediate inability to stay safe requires direct professional assessment. Suicide risk can occur with or without diagnosed depression. NIMH teen depression.
IV. Depression or Ordinary Teenage Mood Changes?
Adolescence involves changing roles, peer relationships, sleep schedules, academic pressures, and growing independence. Brief emotional reactions and shifts in motivation are common. Clinicians assess persistence, severity, breadth, change from usual behavior, associated symptoms, and effects on daily life. No isolated behavior provides a definitive dividing line. AAP GLAD-PC Part I.
Context can affect how distress appears. A teenager may laugh with friends and still experience depressive symptoms at night. Another may be visibly irritable during exam week without having a depressive disorder. A careful conversation investigates what has changed, whether the change has continued, and how the teenager understands it. Safety concerns require attention regardless of duration. NIMH depression.
V. What Contributes to Teen Depression?
Depression develops through interactions among biological, developmental, psychological, and social factors. Family history, earlier depressive episodes, chronic illness, stressful experiences, difficult relationships, maltreatment, bullying, and coexisting mental health problems can increase risk. A risk association is not proof that one event caused an individual's illness. USPSTF.
Family history helps clinicians ask about depressive and bipolar conditions, previous treatment responses, and sources of support. Genetic and neurobiological findings do not amount to a single validated test that can diagnose depression. A simple chemical-imbalance story cannot capture the diversity of depressive conditions or explain an individual teenager's clinical history. NIMH depression.
Bullying, harassment, abuse, isolation, family conflict, losses, and other stressors may influence the onset and course of symptoms. A clinical interview asks about safety at home and school, trusted relationships, cultural context, and ongoing exposure to adversity. For trauma-specific mechanisms and care considerations, see Childhood Trauma and Depression: Risk, Mechanisms, and Treatment. AAP GLAD-PC Part I.
Sleep disruption, substance use, long-term pain, medications, medical conditions, and severe academic stress can complicate depression or resemble aspects of it. Social media can affect sleep, comparison, harassment, and connection; observational correlations alone do not prove that screen time causes a teenager's depression. Separate evidence is discussed in Social Media and Depression: What the Evidence Shows. Assessment addresses the young person's whole environment.
VI. Depression Screening in Teens
The U.S. Preventive Services Task Force recommends routine screening for major depressive disorder in adolescents aged 12 to 18, a grade B recommendation. This applies to people without already recognized symptoms or diagnosed depression. For children 11 or younger, evidence is insufficient for an equivalent population-wide recommendation; this does not limit the assessment of a symptomatic child. USPSTF 2022 recommendation.
The AAP's GLAD-PC guidance recommends annual universal depression screening from age 12 at health maintenance visits, alongside reliable follow-up systems. Clinics need a plan for confidential responses, clinical review, evaluation of positive screens, safety assessment, and access to appropriate services. Screening only becomes meaningful when further care is available. AAP GLAD-PC Part I.
1. What questionnaires are used?
Clinicians may use the Patient Health Questionnaire for Adolescents (PHQ-A), adolescent adaptations of the PHQ-9, the Mood and Feelings Questionnaire, or other validated measures suitable for the setting and age group. Their scoring properties, validation evidence, and thresholds vary. A score can help identify symptoms or follow change over time, but it cannot determine a diagnosis, replace an interview, or rule out bipolar disorder. AAP GLAD-PC Part I.
2. What does a positive screening result mean?
A positive result indicates that questions about mood, pleasure, duration, clinical impairment, medical and developmental context, other mental health conditions, and safety are appropriate. It does not automatically establish major depressive disorder. Screening can produce false positives and false negatives. Clinical concern persists when serious symptoms are reported even if a numerical score appears low. USPSTF.
3. Is depression screening the same as suicide-risk screening?
No. The USPSTF recommends depression screening for adolescents aged 12–18 but judged evidence insufficient to determine the net benefit of universal suicide-risk screening in asymptomatic children and adolescents. That population-screening conclusion does not excuse clinicians from directly evaluating suicide risk when symptoms or concerns arise. The two clinical questions must be kept distinct. USPSTF recommendation.
4. Why confidentiality matters
Teenagers may hesitate to disclose emotions, substance use, bullying, relationships, self-harm, or family problems in front of caregivers. Clinicians commonly create time to speak with the adolescent privately while gathering relevant caregiver information. They explain confidentiality, consent rules, and circumstances in which safety requires sharing information. These details depend on jurisdiction and clinical setting. AAP GLAD-PC Part I.
VII. How Doctors Diagnose Depression in Teenagers
A diagnosis depends on a clinical evaluation of symptoms, duration, distress, impairment, medical history, medications, substance use, psychiatric history, development, family circumstances, and safety. A pediatrician may start the evaluation and involve mental health specialists. Diagnostic interviews and rating scales can supplement professional judgment. No questionnaire, laboratory test, imaging study, or genetic profile independently establishes major depressive disorder. AACAP guideline.
A major depressive episode generally requires a qualifying cluster of symptoms persisting at least two weeks, including depressive or irritable mood or diminished interest or pleasure. Clinicians assess whether a depressive disorder accounts for the experience, whether another condition better explains it, and whether clinically important distress exists below a formal threshold. The full process is discussed in Depression Diagnosis: What a Clinical Evaluation Includes. NIMH depression.
Persistent depressive disorder involves a longer course. Under DSM criteria, the depressed or irritable mood pattern for children and adolescents typically extends for at least one year with additional symptoms and specified limits on symptom-free periods. A person may also experience repeated depressive episodes over time. The distinctions influence longitudinal assessment and treatment planning. AACAP guideline.
Mild, moderate, and severe refer to judgments about symptoms, impairment, and risk; they are not determined by an online severity quiz. Depression can be characterized by anxious distress or certain clinical specifiers, including melancholic, atypical, psychotic, or seasonal features. These are classification features or patterns, not new stand-alone diagnoses. Psychotic features and major impairment call for specialist attention. NICE NG134.
VIII. Differential Diagnosis and Conditions That Commonly Coexist
1. Anxiety and obsessive-compulsive symptoms
Anxiety disorders may produce insomnia, difficulty concentrating, fatigue, and withdrawal. They also commonly coexist with depressive disorders. OCD symptoms, intrusive thoughts, and compulsions may add guilt and distress that need specific assessment. These questions have separate clinical owners within the Hub: Anxiety and Depression: Why They Commonly Co-Occur and OCD and Depression: What Is the Connection?. AAP GLAD-PC Part I.
2. ADHD, autism, and learning differences
A teen's concentration difficulties may arise from attention-deficit/hyperactivity disorder, anxiety, depression, inadequate sleep, learning difficulties, or overlapping conditions. Autistic and other neurodivergent teenagers can experience depression, and clinicians should compare reported changes with that individual's baseline while adapting communication and assessment methods. A learning or sensory need should not automatically be interpreted as a depressive symptom. NICE NG134.
3. Bipolar disorder and hypomania
Before deciding on antidepressant treatment, clinicians ask whether the young person has had periods of unusually elevated or expansive mood or markedly irritable mood accompanied by distinctly increased energy, reduced need for sleep, rapid speech, heightened activity, or risky behavior. These patterns may indicate mania or hypomania and require a different diagnostic pathway. Unrecognized bipolar disorder can complicate antidepressant treatment decisions. Bipolar depression belongs to the bipolar disorders field rather than being assumed to be ordinary unipolar depression. AAP GLAD-PC Part I.
4. Physical conditions, substances, and eating disorders
Thyroid disorders, anemia, nutritional problems, chronic pain, medication effects, intoxication, and withdrawal may contribute to symptoms. Eating disorders and substance use disorders also require independent assessment and may coexist with depression. A clinician may request targeted medical investigations when history and examination indicate them; universal laboratory panels cannot substitute for the clinical interview. AACAP guideline.
IX. Understanding Suicide Risk and Immediate Safety
Depression is associated with elevated suicide risk in some teenagers, but suicidal thinking is neither universal in depression nor confined to people with a depressive disorder. Direct, calm questions about thoughts of death, self-harm, plans, intent, previous actions, access to potentially lethal means, and available supports are appropriate when risk is suspected. A safety assessment is a clinical task regardless of whether a diagnosis has been finalized. AAP GLAD-PC Part I.
Signs requiring urgent professional evaluation include new or escalating suicidal thoughts, recent self-harm, behavior indicating preparation for suicide, severe agitation, psychotic symptoms, or inability to remain safe. Families should know how to reach emergency services and the young person's treating team. A collaborative safety plan can identify warning signs, supportive contacts, urgent resources, and ways to reduce access to lethal means. An informal promise not to self-harm cannot substitute for evidence-based safety planning. AAP GLAD-PC Part I.
For immediate danger, call local emergency services or go to an emergency department and remain with the teenager if it is safe to do so. In the United States, call or text 988 for crisis support. The dedicated crisis response belongs to specialist suicide-prevention care; ordinary outpatient depression advice is inadequate for an immediate emergency. NIMH teen depression.
X. Choosing Treatment for Teen Depression
Treatment depends on symptom severity, duration, prior episodes, risk, coexisting conditions, developmental needs, availability of care, and the teenager's preferences. Care may involve structured active monitoring, psychotherapy, antidepressant medication, or combined treatment. Families and teenagers should understand the goals, what evidence supports each option, what adverse effects to watch for, and how the clinician will track improvement. AAP GLAD-PC Part II.
1. Active support for selected mild cases
For mild depression without significant immediate risk, U.S. primary care guidance describes active support and monitoring. This may include education, practical work on routines, help with manageable enjoyable activities, addressing immediate stressors, identifying supportive relationships, and scheduling reassessment. “Monitoring” means organized contact and a plan to escalate care when symptoms persist or worsen, not simply leaving a teenager to cope alone. AAP GLAD-PC Part II.
NICE recommends developmentally appropriate psychological treatments for persistent mild depression in young people, with options chosen according to circumstances and preferences. Differences between healthcare systems affect how services sequence these options, but both approaches require follow-up and response to changing impairment or risk. NICE NG134.
2. Moderate or severe depression
Moderate or severe presentations usually call for prompt structured treatment, often with mental health specialist input, particularly when functioning has deteriorated substantially. Evidence-based psychotherapy is central, and medication can be considered through an individualized risk-benefit discussion. Some adolescents benefit from combined approaches. The correct plan depends on the diagnosis, risks, treatment history, and ability to maintain contact with the team. AACAP guideline.
XI. Psychological Treatments for Adolescents
1. Cognitive behavioral therapy
Cognitive behavioral therapy (CBT) is a structured form of psychotherapy that helps teenagers recognize links among thoughts, emotions, activities, and consequences. It may involve gradually increasing engagement with valued activities, examining self-critical beliefs, developing coping strategies, and practicing skills between sessions. Treatment should fit the teenager's circumstances and developmental level. CBT is not an instruction to suppress sadness or pretend to be happy. AACAP guideline.
For young people aged 12–18 with moderate to severe depression, NICE recommends offering individual CBT for at least three months, with other psychotherapy options where CBT is unsuitable or does not meet clinical needs. Session structure and duration must be adapted to the real treatment setting. NICE NG134.
2. Interpersonal psychotherapy for adolescents
Interpersonal psychotherapy for adolescents (IPT-A) examines how mood symptoms interact with relationships, losses, interpersonal conflicts, and changing social roles. A therapist may work on communication, problem solving, and seeking support. It is an established option for selected teenagers, depending on assessment and availability of trained providers. NICE NG134.
3. Family involvement and other approaches
Family approaches can help identify stressors, resolve practical barriers, improve communication, and coordinate the treatment plan. Family treatment does not imply that caregivers caused the depression. Depending on clinical needs, specialists may consider supportive interventions or other evidence-informed psychotherapies. The teenager's privacy and participation in shared decisions remain important. AACAP guideline.
XII. Antidepressants for Teenagers
Antidepressants are prescribed when the clinical assessment indicates that possible benefits justify potential risks and suitable monitoring can be provided. In the United States, fluoxetine has an FDA-approved indication for pediatric major depressive disorder from age 8, and escitalopram from age 12. This is an indication-specific regulatory distinction: it does not mean all other medications are universally prohibited or that every eligible teenager should receive one. Escitalopram prescribing information, DailyMed and AACAP guideline.
1. How strong is the evidence for medication?
The original Treatment for Adolescents With Depression Study (TADS) reported 12-week response rates of 71.0% with fluoxetine plus CBT, 60.6% with fluoxetine alone, 43.2% with CBT alone, and 34.8% with placebo. These are results from one influential randomized trial using a particular response definition, not an estimate of what will happen to a particular teenager. TADS original JAMA trial.
The overall medication evidence is more complicated. A 2021 Cochrane network meta-analysis concluded that average benefits for newer antidepressants versus placebo were generally small and might not reach a meaningful level for some patients, with uncertainty regarding adverse outcomes. A 2020 comparative review of therapy, medication, and combined treatment30137-1) found advantages for selected treatments but assigned low or very low certainty to many comparisons. Differences in age, severity, trial design, and outcomes matter.
A 2026 meta-analytic reappraisal argued that accumulating pediatric fluoxetine studies showed diminishing average effect sizes and questioned whether the average effect remained clinically meaningful. Current professional guidelines still support selected medication use based on clinical need. These differing interpretations should be represented openly. Informed decisions acknowledge modest or uncertain average effects, individual variability, possible adverse effects, available alternatives, and the consequences of leaving serious depression untreated.
2. FDA warning about suicidal thoughts and behavior
Antidepressants carry a boxed warning about increased suicidal thoughts and behaviors in children, adolescents, and young adults during short-term studies. Historical pediatric trial analyses found suicide-related thoughts or behaviors in approximately 4% receiving antidepressants compared with 2% receiving placebo; no completed suicides were recorded in those trials. Those pooled figures are not a forecast for an individual patient and must be discussed alongside baseline depression-related risk. FDA-regulated escitalopram label and AAP review of adolescent suicidality.
Close monitoring is especially important early in medication treatment and after changes in dose. Families and teenagers should be told how to report worsening mood, unusual agitation, abrupt behavioral changes, suicidal thoughts, or possible mania. The clinician also reviews sleep, appetite, gastrointestinal complaints, headaches, emotional changes, other side effects, and functional improvement. Medication monitoring is a continuing clinical process rather than a one-time prescription. AAP GLAD-PC Part II.
3. Starting, continuing, and stopping medication
Before starting treatment, the clinician discusses the diagnosis, other medicines, substance use, family history of bipolar disorder, previous episodes, expected follow-up, and the teenager's preferences. A treatment plan should specify how improvement and adverse effects will be assessed and when care will be reviewed. Some antidepressants can produce discontinuation symptoms if stopped abruptly. Medication should be adjusted or tapered with the prescriber rather than independently stopped or changed. NICE NG134.
XIII. What Happens If Treatment Is Not Helping?
Clinicians should review the diagnosis, treatment adequacy, attendance, medication adherence and tolerability if applicable, coexisting conditions, family stressors, sleep, substance use, and safety. Failure after a few sessions does not automatically establish “treatment-resistant depression.” This expression requires a carefully documented history of adequate treatments and outcome assessment, and definitions can vary. Reassessment can change the formulation and next steps. NICE NG134.
In the TORDIA randomized study, teenagers who had not improved after an initial SSRI had a higher clinical response rate when a medication switch was combined with CBT (54.8%) compared with medication switching without CBT (40.5%). Switching to venlafaxine did not provide greater effectiveness than switching to another SSRI and involved additional adverse-effect concerns. This study informs specialist treatment planning but is not a self-treatment protocol. TORDIA original trial.
A young person with repeated nonresponse, persistent suicidal thoughts, suspected bipolar disorder, psychotic symptoms, or profound impairment may require specialized or more intensive care. Psychological, family, medical, and practical components remain important. The response to one intervention does not necessarily define future prognosis. AACAP guideline.
XIV. ECT, TMS, Ketamine, and Other Specialized Interventions
Electroconvulsive therapy (ECT) is not routine adolescent depression treatment. In exceptional severe or life-threatening cases it may be considered in specialist settings with safeguards, informed consent procedures, and careful benefit-risk assessment. Repetitive transcranial magnetic stimulation (TMS) has evolving youth evidence and device-specific regulatory indications that can depend on age and jurisdiction; adult treatment evidence should not be assumed to establish the same benefit or indication in every adolescent. NICE NG134.
Ketamine and esketamine attract interest for difficult-to-treat depression, yet treatment studies and authorizations in adults cannot automatically be extended to teenagers. Pediatric research is relatively limited, and any proposed use requires age-specific evidence, regulatory review, qualified clinicians, and monitoring of potential harms. A family should ask whether a proposed treatment is approved for that specific age and indication, and what evidence supports it. AACAP guideline.
XV. How Parents and Caregivers Can Help
1. Start a conversation without a diagnosis
Use a concrete observation: “I've noticed you seem exhausted and have stopped seeing your friends. How have you been feeling?” Listen and ask follow-up questions. A teenager might say “nothing matters,” “I'm overwhelmed,” or “I can't concentrate” instead of naming depression. Recognize the distress while allowing room for the teenager's own explanation. NIMH teen depression.
2. Arrange an assessment and follow-through
A pediatrician or qualified mental health clinician can evaluate symptoms, functioning, differential diagnoses, and risk. Help the teenager attend appointments, explain what will happen, and identify practical obstacles such as travel, cost, language, or schedule. Ask who to contact when symptoms worsen and how the care team coordinates therapy, school, and family support. AAP GLAD-PC Part I.
3. Support daily functioning
Offer predictable contact, help with regular meals and rest, assist with a manageable schedule, and encourage connection with supportive people. Gradual return to valued activity can be more realistic than expecting motivation to return first. These habits support overall care rather than replacing diagnosis or evidence-based treatment. Family members may seek professional advice for their own strain as well. AAP GLAD-PC Part II.
4. Know the urgent warning signs
If a teenager expresses active suicidal thoughts, injures themself, exhibits psychotic symptoms or extreme agitation, or cannot remain safe, obtain urgent professional evaluation. Do not leave the response to peer reassurance or promises of secrecy. Use emergency services for immediate danger and create a concrete safety plan with the treating clinician when appropriate. AAP GLAD-PC Part I.
XVI. What Teenagers Can Do
If you are a teenager experiencing weeks of low mood, irritability, emotional numbness, exhaustion, or loss of enjoyment, tell a trusted adult or healthcare professional. You can describe what changed without knowing what it is called. A simple message such as “I'm struggling and need help figuring out what's going on” is enough to begin. Teachers, school counselors, relatives, and coaches may help you reach appropriate care. NIMH teen depression.
You can ask a clinician what information remains confidential, why certain questions are asked, what treatments involve, and what your choices are. Write down changes in sleep, school, relationships, or activities if speaking is difficult. Treatment should involve your experience, values, preferences, and questions. AAP GLAD-PC Part I.
Supportive routines, gentle activity, and contact with trusted people can help while professional care is arranged, but they are not a test of willpower or substitutes for treatment. If you may act on suicidal thoughts or feel in immediate danger, seek emergency help. In the United States you can call or text 988. NIMH teen depression.
XVII. School Support, Attendance, and Privacy
Depression can influence attendance, completion of schoolwork, memory, concentration, and participation in friendships. School responses may include a trusted adult, practical schedule adjustments, support for missed assignments, gradual reentry, and response to bullying. Decisions should be guided by individual needs and local educational arrangements, with attention to privacy. Schools and families can coordinate with qualified treating clinicians. AAP GLAD-PC Part I.
A school counselor may help organize support or referral, but complex or severe depression requires appropriate clinical evaluation and treatment. Young people deserve an explanation of what information is shared, with whom, and for what reason. School success is one domain of recovery alongside well-being, relationships, safety, and the ability to enjoy ordinary life. NICE NG134.
XVIII. Recovery, Remission, Relapse, and Recurrence
Treatment response refers to meaningful improvement, while remission indicates that clinically significant depressive symptoms have sufficiently resolved under the relevant definition. Relapse describes the return of symptoms before stable recovery is established; recurrence describes a later new depressive episode after recovery. Different studies and services may operationalize these terms differently, which is one reason a clinician evaluates actual functioning alongside rating scales. AACAP guideline.
Improvement may involve better sleep, renewed enjoyment, returning to school, communicating more easily, or less persistent hopelessness. Symptoms can improve unevenly. Continuing care after initial improvement, including relapse-prevention planning and supervised medication changes where relevant, can support sustained recovery. Any recurrence of concerning symptoms warrants reassessment, particularly after previous severe episodes. AAP GLAD-PC Part II and NICE NG134.
XIX. Frequently Asked Questions
1. What are the first signs of depression in teens?
Persistent sadness or irritability, loss of interest, exhaustion, disturbed sleep, concentration problems, withdrawal, and changes in school participation are common warning signs. The pattern and the change from usual functioning matter more than a single sign. NIMH teen depression.
2. Can a teen be depressed without looking sad?
Yes. Irritability, fatigue, emotional numbness, and reduced pleasure can be prominent, and some teenagers maintain external routines. Visible cheerfulness or good grades cannot independently confirm or exclude a depressive disorder. NIMH teen depression.
3. How long must symptoms last?
A typical major depressive episode includes at least two weeks of a qualifying symptom pattern. Persistent depressive disorder has longer duration criteria. Urgent risk or serious impairment should be assessed without waiting for a time threshold. NIMH depression.
4. Can the PHQ-9 or PHQ-A diagnose depression?
No. These tools can help screen for symptoms and monitor treatment progress. Diagnosis is based on clinical assessment, functional impact, differential diagnosis, and safety evaluation. AAP GLAD-PC Part I.
5. At what age is depression screening recommended?
In U.S. preventive care, routine major depression screening is recommended at ages 12–18, and AAP guidance recommends annual screening at health visits for adolescents aged 12 and older. Symptomatic younger children should still receive assessment when appropriate. USPSTF.
6. Does every teenager with depression need an antidepressant?
No. Psychotherapy, organized monitoring in selected mild cases, medication in clinically appropriate circumstances, and combined care are options. Choice depends on severity, safety, response to earlier treatment, and informed preferences. AACAP guideline.
7. Which medications are FDA-approved for pediatric major depression?
Fluoxetine is approved from age 8 and escitalopram from age 12 for major depressive disorder. A prescribing clinician must consider individual indications, benefits, risks, comorbidities, and close follow-up. DailyMed escitalopram prescribing information.
8. Can anxiety and depression occur together?
Yes. They frequently coexist, share some symptoms, and require differentiated assessment. Read Anxiety and Depression: Why They Commonly Co-Occur for the separate evidence question.
9. What if a teenager refuses to talk?
Offer another trusted adult, maintain a calm invitation, avoid punitive assumptions, and seek professional advice when symptoms persist or functioning deteriorates. Explain the purpose and confidentiality of evaluation. Immediate safety concerns require prompt professional attention. AAP GLAD-PC Part I.
10. When is it an emergency?
Immediate suicidal danger, recent dangerous self-harm, suspected psychosis with unsafe behavior, or inability to maintain basic safety requires urgent assessment. Contact emergency services in an immediate emergency; the U.S. 988 service provides crisis support. NIMH teen depression.
XX. Clinical and Practical Conclusions
Adolescent depression is assessed through sustained changes in symptoms, developmentally appropriate clinical interviewing, differential diagnosis, and attention to the teenager's actual functioning. Screening supports early recognition; it is not diagnosis. Evidence-based psychotherapy, informed and monitored medication decisions where appropriate, coordinated family and school support, and follow-up provide a coherent care pathway. AAP GLAD-PC guidelines and AACAP guideline.
The central objective is a young person who can be heard, receive an accurate assessment, understand the available care choices, and regain participation in daily life while safety is actively protected. Scientific uncertainty about average treatment effects belongs in shared decision-making, alongside the real possibility of improvement and the clinical consequences of leaving serious depression unaddressed.
Related Articles
Depression Diagnosis: What a Clinical Evaluation Includes — evaluation, duration, symptoms, and alternative explanations.
Anxiety and Depression: Why They Commonly Co-Occur — overlapping emotional and behavioral symptoms.
Childhood Trauma and Depression: Risk, Mechanisms, and Treatment — evidence concerning trauma-specific pathways.
Social Media and Depression: What the Evidence Shows — association and causal interpretation.
OCD and Depression: What Is the Connection? — comorbidity and clinical assessment.
References
American Academy of Child and Adolescent Psychiatry. Walter, H. J., et al. (2023). Clinical practice guideline for the assessment and treatment of children and adolescents with major and persistent depressive disorders. Journal of the American Academy of Child & Adolescent Psychiatry, 62(5), 479–502. https://doi.org/10.1016/j.jaac.2022.10.001
American Academy of Pediatrics. (2016). Suicide and suicide attempts in adolescents. Pediatrics, 138(1), e20161420. https://publications.aap.org/pediatrics/article/138/1/e20161420/52498
American Academy of Pediatrics. Cheung, A. H., et al. (2018; endorsement reaffirmed 2025). Guidelines for Adolescent Depression in Primary Care (GLAD-PC): Part II. Treatment and ongoing management. Pediatrics, 141(3), e20174082. https://doi.org/10.1542/peds.2017-4082
American Academy of Pediatrics. Zuckerbrot, R. A., et al. (2018; endorsement reaffirmed 2025). Guidelines for Adolescent Depression in Primary Care (GLAD-PC): Part I. Practice preparation, identification, assessment, and initial management. Pediatrics, 141(3), e20174081. https://doi.org/10.1542/peds.2017-4081
Cochrane Database of Systematic Reviews. Hetrick, S. E., et al. (2021). New generation antidepressants for depression in children and adolescents: A network meta-analysis. CD013674. https://doi.org/10.1002/14651858.CD013674.pub2
JAMA. Brent, D., et al. (2008). Switching to another SSRI or to venlafaxine with or without cognitive behavioral therapy for adolescents with SSRI-resistant depression: The TORDIA randomized controlled trial. 299(8), 901–913. https://doi.org/10.1001/jama.299.8.901
JAMA. Treatment for Adolescents With Depression Study Team. (2004). Fluoxetine, cognitive-behavioral therapy, and their combination for adolescents with depression: A randomized controlled trial. 292(7), 807–820. https://doi.org/10.1001/jama.292.7.807
Journal of Clinical Epidemiology. Plöderl, M., et al. (2026). The loss of efficacy of fluoxetine in pediatric depression: Explanations, lack of acknowledgment, and implications for other treatments. 189, 112016. https://doi.org/10.1016/j.jclinepi.2025.112016
Lancet Psychiatry. (2020). Comparative efficacy and acceptability of antidepressants, psychotherapies, and their combination for acute treatment of children and adolescents with depressive disorder: A systematic review and network meta-analysis. https://doi.org/10.1016/S2215-0366(20)30137-130137-1)
National Institute for Health and Care Excellence. (2019). Depression in children and young people: Identification and management (NG134). https://www.nice.org.uk/guidance/ng134/chapter/Recommendations
National Institute of Mental Health. (n.d.). Depression. https://www.nimh.nih.gov/health/publications/depression
National Institute of Mental Health. (n.d.). Teen depression: More than just moodiness. https://www.nimh.nih.gov/health/publications/teen-depression
Substance Abuse and Mental Health Services Administration. (2026). Key substance use and mental health indicators in the United States: Results from the 2025 National Survey on Drug Use and Health. https://www.samhsa.gov/data/sites/default/files/reports/rpt57150/2025-nsduh-annual-national-html/2025-nsduh-annual-national.htm
U.S. National Library of Medicine, DailyMed. (2026). Escitalopram oral solution: Prescribing information. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=79fddc2d-2dc2-444f-8fd3-0337090ee744
U.S. Preventive Services Task Force. (2022). Depression and suicide risk in children and adolescents: Screening. https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/screening-depression-suicide-risk-children-adolescents